KNOWLEDGE BASE
Business Directory
The directory is the oldest idea in local search and the one people most often dismiss. It predates Google by a century, and its logic — businesses sorted by what they do and where they are — is still the logic underneath every map result you see today.
Directories, One Layer Down
Six entities that make up the directory landscape — from the phone book to the platforms that replaced it.
PRINT
Yellow Pages
The category system everything still runs on.
3 GUIDES
MARKETPLACE
Angi
From a paid list to a lead broker.
3 GUIDES
MARKETPLACE
Thumbtack
Introductions sold to local pros.
3 GUIDES
CITATIONS
Web Directory
Human-edited lists and the links they pass.
2 GUIDES
REFERENCE
Telephone Directory
Who you are versus what you do.
REFERENCE
REFERENCE
Citysearch
The city guide that lost to the crowd.
REFERENCEWhat Is a Business Directory?
A business directory is a listing of businesses organized by category, location, or trade. It began in print — the yellow-paper section of the phone book — and moved online largely unchanged in purpose. Its function then and now is the same: let a buyer who knows what they need but not who provides it survey the options without assembling the list themselves.
The category system is older than the web.
The convention of separating businesses by trade dates to the 1880s. That taxonomy — plumbers, locksmiths, dentists — did not disappear when directories moved online. It became the category field on a modern business listing, and it is still the primary way a machine decides what a business is.
What the web actually changed.
Three things: currency, because a listing can now be corrected the day it goes stale rather than a year later; search, because a directory can be queried and not only browsed; and quality, because reviews gave directories a signal the print edition never had. The organizing principle underneath did not change at all.
Why this still matters to ranking.
Directory listings are where a search engine cross-checks what a business claims about itself. When the name, address and phone number agree across sources, that agreement is a trust signal. When they disagree, that disagreement is a trust problem — and it is usually invisible to the business until visibility has already gone. Keeping those sources in agreement is a core part of local SEO services.
Wikipedia: Business directory
The reference article on business directories — their category taxonomy, print origins, and migration to the web.
Read the full article →The yellow paper was an accident. In 1883 a Cheyenne printer ran out of white stock and finished a phone directory on yellow — the business section happened to be what landed on it.
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